:root{
    --bg:#070b12;
    --bg-2:#0b1220;
    --panel:#0f1826;
    --panel-2:#131f31;
    --line:#1f2f44;
    --text:#e7eefb;
    --muted:#93a6c2;
    --green:#22e08a;      /* PCB / circuit green */
    --green-dim:#0f7d4e;
    --cyan:#38d3ff;       /* tech blue */
    --copper:#f2a65a;     /* copper trace / solder */
    --copper-2:#e07b39;
    --radius:16px;
    --maxw:1200px;
    --shadow:0 24px 60px -20px rgba(0,0,0,.7);
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{
    font-family:'Inter',system-ui,sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.65;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  h1,h2,h3,h4{font-family:'Space Grotesk',sans-serif;line-height:1.15;font-weight:700;letter-spacing:-.02em}
  a{color:inherit;text-decoration:none}
  img{display:block;max-width:100%}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
  .mono{font-family:'JetBrains Mono',monospace}
  .accent-green{color:var(--green)}
  .accent-cyan{color:var(--cyan)}
  .accent-copper{color:var(--copper)}

  /* ---------- Circuit background layer ---------- */
  .circuit-bg{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5}
  .circuit-bg svg{width:100%;height:100%}

  /* ---------- Navbar ---------- */
  header.nav{
    position:fixed;top:0;left:0;right:0;z-index:100;
    backdrop-filter:blur(12px);
    background:rgba(7,11,18,.72);
    border-bottom:1px solid transparent;
    transition:border-color .3s, background .3s;
  }
  header.nav.scrolled{border-bottom:1px solid var(--line);background:rgba(7,11,18,.9)}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
  .brand{display:flex;align-items:center;gap:12px;font-family:'Space Grotesk';font-weight:700;font-size:1.05rem}
  .brand .chip{
    width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
    background:linear-gradient(135deg,var(--green-dim),#06251a);
    border:1px solid var(--green);color:var(--green);flex:none;
    box-shadow:0 0 18px -4px var(--green);
  }
  .brand small{display:block;font-family:'Inter';font-weight:500;color:var(--muted);font-size:.7rem;letter-spacing:.04em}
  .nav-links{display:flex;gap:6px;align-items:center}
  .nav-links a{
    font-size:.86rem;color:var(--muted);padding:9px 14px;border-radius:9px;font-weight:500;
    transition:.2s;
  }
  .nav-links a:hover{color:var(--text);background:var(--panel-2)}
  .nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--text);
    width:44px;height:44px;border-radius:10px;cursor:pointer;font-size:1.3rem}

  /* ---------- Hero ---------- */
  .hero{position:relative;z-index:1;padding:150px 0 90px;overflow:hidden}
  .hero .wrap{position:relative;z-index:2}
  .eyebrow{
    display:inline-flex;align-items:center;gap:10px;
    font-family:'JetBrains Mono';font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;
    color:var(--green);border:1px solid var(--green-dim);
    background:rgba(34,224,138,.06);padding:7px 14px;border-radius:100px;margin-bottom:26px;
  }
  .eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green);animation:pulse 2s infinite}
  @keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
  .hero h1{font-size:clamp(2.4rem,6vw,4.4rem);margin-bottom:22px;max-width:16ch}
  .hero h1 .grad{
    background:linear-gradient(100deg,var(--green),var(--cyan) 55%,var(--copper));
    -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  }
  .hero p.lead{font-size:clamp(1.05rem,2vw,1.28rem);color:var(--muted);max-width:60ch;margin-bottom:36px}
  .hero-cta{display:flex;gap:14px;flex-wrap:wrap}
  .btn{
    display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:.95rem;
    padding:14px 26px;border-radius:11px;cursor:pointer;transition:.25s;border:1px solid transparent;
  }
  .btn-primary{background:linear-gradient(135deg,var(--green),var(--green-dim));color:#04150d;box-shadow:0 12px 30px -10px var(--green)}
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -12px var(--green)}
  .btn-ghost{border-color:var(--line);color:var(--text);background:rgba(255,255,255,.02)}
  .btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}

  .hero-stats{
    display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:64px;
    background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  }
  .hero-stats .stat{background:var(--panel);padding:26px 22px}
  .hero-stats .num{font-family:'Space Grotesk';font-size:clamp(1.7rem,3vw,2.3rem);font-weight:700;color:var(--green)}
  .hero-stats .stat:nth-child(2) .num{color:var(--cyan)}
  .hero-stats .stat:nth-child(3) .num{color:var(--copper)}
  .hero-stats .stat:nth-child(4) .num{color:var(--green)}
  .hero-stats .lbl{color:var(--muted);font-size:.82rem;margin-top:4px}

  /* ---------- Sections ---------- */
  section{position:relative;z-index:1;padding:90px 0}
  .sec-head{margin-bottom:52px;max-width:70ch}
  .sec-tag{font-family:'JetBrains Mono';font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);display:block;margin-bottom:14px}
  .sec-head h2{font-size:clamp(1.9rem,4vw,2.9rem);margin-bottom:16px}
  .sec-head p{color:var(--muted);font-size:1.08rem}
  .divider-top{border-top:1px solid var(--line)}

  /* Introducción */
  .intro-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:start}
  .intro-grid p{color:#c3d1e6;margin-bottom:18px}
  .intro-grid p strong{color:var(--text)}
  .highlight-card{
    background:linear-gradient(160deg,var(--panel-2),var(--panel));
    border:1px solid var(--line);border-radius:var(--radius);padding:30px;position:relative;overflow:hidden;
  }
  .highlight-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--green),var(--cyan),var(--copper))}
  .highlight-card h3{font-size:1.15rem;margin-bottom:18px;display:flex;align-items:center;gap:10px}
  .ods-list{display:flex;flex-direction:column;gap:14px}
  .ods{display:flex;gap:14px;align-items:flex-start}
  .ods .badge{flex:none;width:44px;height:44px;border-radius:10px;display:grid;place-items:center;font-family:'Space Grotesk';font-weight:700;color:#04150d;font-size:.95rem}
  .ods:nth-child(1) .badge{background:var(--copper)}
  .ods:nth-child(2) .badge{background:var(--green)}
  .ods:nth-child(3) .badge{background:var(--cyan)}
  .ods:nth-child(4) .badge{background:#c94f7c;color:#fff}
  .ods:nth-child(5) .badge{background:#8b6df0;color:#fff}
  .ods .t{font-weight:600;font-size:.95rem}
  .ods .d{color:var(--muted);font-size:.85rem}

  /* Centros */
  .centros-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
  .centro{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px;
    transition:.28s;position:relative;overflow:hidden;
  }
  .centro:hover{border-color:var(--green-dim);transform:translateY(-4px);box-shadow:var(--shadow)}
  .centro .role{
    font-family:'JetBrains Mono';font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
    padding:5px 11px;border-radius:100px;display:inline-block;margin-bottom:16px;
    background:rgba(56,211,255,.09);color:var(--cyan);border:1px solid rgba(56,211,255,.25);
  }
  .centro.coord .role{background:rgba(34,224,138,.1);color:var(--green);border-color:rgba(34,224,138,.3)}
  .centro.empresa .role{background:rgba(242,166,90,.1);color:var(--copper);border-color:rgba(242,166,90,.3)}
  .centro h3{font-size:1.25rem;margin-bottom:6px}
  .centro .loc{color:var(--muted);font-size:.88rem;margin-bottom:16px}
  .centro .tasks{color:#c3d1e6;font-size:.9rem;border-top:1px solid var(--line);padding-top:16px}
  .centro .tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
  .centro .tag-list span{font-size:.72rem;color:var(--muted);background:var(--panel-2);padding:4px 10px;border-radius:6px;border:1px solid var(--line)}

  /* Tecnologías */
  .tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
  .tech{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.28s;
  }
  .tech:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--shadow)}
  .tech .ico{width:52px;height:52px;border-radius:12px;display:grid;place-items:center;margin-bottom:18px;
    background:var(--panel-2);border:1px solid var(--line);font-size:1.5rem}
  .tech h3{font-size:1.1rem;margin-bottom:8px}
  .tech p{color:var(--muted);font-size:.9rem}

  /* Desarrollo timeline */
  .timeline{position:relative;margin-top:20px;padding-left:0}
  .phase{
    display:grid;grid-template-columns:auto 1fr;gap:28px;position:relative;padding-bottom:40px;
  }
  .phase:last-child{padding-bottom:0}
  .phase .rail{display:flex;flex-direction:column;align-items:center}
  .phase .node{
    width:56px;height:56px;border-radius:14px;flex:none;display:grid;place-items:center;
    font-family:'Space Grotesk';font-weight:700;font-size:1.2rem;
    background:linear-gradient(135deg,var(--panel-2),var(--panel));border:1px solid var(--green-dim);color:var(--green);
    box-shadow:0 0 22px -8px var(--green);z-index:2;
  }
  .phase .line{width:2px;flex:1;background:linear-gradient(var(--green-dim),transparent);margin-top:6px}
  .phase:last-child .line{display:none}
  .phase .body{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}
  .phase .body:hover{border-color:var(--green-dim)}
  .phase .when{font-family:'JetBrains Mono';font-size:.74rem;color:var(--copper);letter-spacing:.06em;margin-bottom:8px}
  .phase h3{font-size:1.25rem;margin-bottom:10px}
  .phase ul{list-style:none;display:flex;flex-direction:column;gap:9px}
  .phase li{color:#c3d1e6;font-size:.92rem;padding-left:22px;position:relative}
  .phase li::before{content:"▸";position:absolute;left:0;color:var(--green)}

  .method{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:44px}
  .method .m{background:var(--panel-2);border:1px solid var(--line);border-radius:12px;padding:20px}
  .method .m .k{font-family:'JetBrains Mono';color:var(--cyan);font-size:.8rem;margin-bottom:8px}
  .method .m p{color:var(--muted);font-size:.86rem}

  /* Galería */
  .gal-filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px}
  .gal-filters button{
    font-family:'Inter';font-size:.85rem;font-weight:500;color:var(--muted);cursor:pointer;
    background:var(--panel);border:1px solid var(--line);padding:9px 18px;border-radius:100px;transition:.2s;
  }
  .gal-filters button:hover{color:var(--text);border-color:var(--green-dim)}
  .gal-filters button.active{background:var(--green);color:#04150d;border-color:var(--green);font-weight:600}
  .gallery{columns:3;column-gap:16px}
  .gallery figure{
    break-inside:avoid;margin:0 0 16px;border-radius:14px;overflow:hidden;position:relative;cursor:pointer;
    border:1px solid var(--line);background:var(--panel);transition:.28s;
  }
  .gallery figure:hover{transform:translateY(-3px);border-color:var(--green);box-shadow:var(--shadow)}
  .gallery img{width:100%;height:auto;transition:.4s;filter:saturate(1.02)}
  .gallery figure:hover img{transform:scale(1.04)}
  .gallery figcaption{
    position:absolute;left:0;right:0;bottom:0;padding:22px 16px 12px;
    background:linear-gradient(transparent,rgba(4,8,14,.92));
    color:var(--text);font-size:.82rem;font-weight:500;opacity:0;transform:translateY(8px);transition:.28s;
  }
  .gallery figure:hover figcaption{opacity:1;transform:translateY(0)}
  .gallery figcaption .cat{font-family:'JetBrains Mono';font-size:.66rem;color:var(--green);letter-spacing:.08em;text-transform:uppercase;display:block;margin-bottom:2px}

  /* Lightbox */
  .lb{position:fixed;inset:0;z-index:200;background:rgba(4,7,12,.94);backdrop-filter:blur(8px);
     display:none;align-items:center;justify-content:center;padding:40px}
  .lb.open{display:flex}
  .lb img{max-width:90vw;max-height:82vh;border-radius:12px;box-shadow:0 30px 80px -20px #000}
  .lb .cap{position:absolute;bottom:26px;left:0;right:0;text-align:center;color:var(--muted);font-size:.9rem}
  .lb button{position:absolute;background:rgba(255,255,255,.06);border:1px solid var(--line);color:#fff;
    width:52px;height:52px;border-radius:50%;font-size:1.4rem;cursor:pointer;transition:.2s;display:grid;place-items:center}
  .lb button:hover{background:var(--green);color:#04150d;border-color:var(--green)}
  .lb .close{top:26px;right:26px}
  .lb .prev{left:26px;top:50%;transform:translateY(-50%)}
  .lb .next{right:26px;top:50%;transform:translateY(-50%)}

  /* Manuales */
  .manuals{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
  .manual{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px;
    display:flex;flex-direction:column;transition:.28s;position:relative;overflow:hidden;
  }
  .manual:hover{transform:translateY(-4px);border-color:var(--copper);box-shadow:var(--shadow)}
  .manual .mico{width:50px;height:50px;border-radius:12px;display:grid;place-items:center;font-size:1.4rem;margin-bottom:20px;
    background:rgba(242,166,90,.1);border:1px solid rgba(242,166,90,.28);color:var(--copper)}
  .manual h3{font-size:1.12rem;margin-bottom:8px}
  .manual p{color:var(--muted);font-size:.88rem;flex:1;margin-bottom:20px}
  .manual .dl{display:inline-flex;align-items:center;gap:8px;font-family:'JetBrains Mono';font-size:.8rem;
    color:var(--copper);font-weight:600}
  .manual .dl.disabled{color:var(--muted);opacity:.7}
  .manual .fmt{position:absolute;top:22px;right:22px;font-family:'JetBrains Mono';font-size:.65rem;color:var(--muted);
    border:1px solid var(--line);padding:3px 8px;border-radius:6px}

  /* CTA banner */
  .cta-band{background:linear-gradient(120deg,var(--panel-2),var(--panel));border:1px solid var(--line);
    border-radius:22px;padding:52px;text-align:center;position:relative;overflow:hidden}
  .cta-band::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at 50% 0%,rgba(34,224,138,.12),transparent 60%)}
  .cta-band .btn{position:relative;z-index:1}
  .cta-band h2{font-size:clamp(1.6rem,3.5vw,2.4rem);margin-bottom:14px;position:relative}
  .cta-band p{color:var(--muted);max-width:56ch;margin:0 auto 28px;position:relative}

  /* Footer */
  footer{position:relative;z-index:1;border-top:1px solid var(--line);background:var(--bg-2);padding-top:64px;margin-top:40px}
  .foot-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:48px;border-bottom:1px solid var(--line)}
  .foot-brand .brand{margin-bottom:16px}
  .foot-brand p{color:var(--muted);font-size:.9rem;max-width:40ch}
  .foot-col h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-bottom:16px;font-family:'JetBrains Mono';font-weight:600}
  .foot-col a,.foot-col p{display:block;color:#b8c6dc;font-size:.9rem;margin-bottom:10px;transition:.2s}
  .foot-col a:hover{color:var(--green)}
  .logos-band{padding:40px 0}
  .logos-band .lbl{text-align:center;font-family:'JetBrains Mono';font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:28px}
  .logos{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:38px 46px;
    background:#fff;border-radius:18px;padding:30px 40px;
  }
  .logos img{height:56px;width:auto;object-fit:contain;transition:.25s}
  .foot-legal{text-align:center;color:var(--muted);font-size:.82rem;padding:26px 0 40px;border-top:1px solid var(--line)}
  .foot-legal .mono{color:var(--green)}

  /* Reveal animation */
  .reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
  .reveal.in{opacity:1;transform:none}

  /* ---------- Responsive ---------- */

  /* Tablet landscape / small laptop */
  @media(max-width:960px){
    .intro-grid,.foot-top{grid-template-columns:1fr}
    .centros-grid,.tech-grid,.manuals,.method{grid-template-columns:repeat(2,1fr)}
    .hero-stats{grid-template-columns:repeat(2,1fr)}
    .gallery{columns:2}
  }

  /* Collapse the top nav into a hamburger menu (covers tablets) */
  @media(max-width:860px){
    .nav-links{
      position:fixed;top:70px;left:0;right:0;flex-direction:column;gap:0;
      background:rgba(7,11,18,.98);border-bottom:1px solid var(--line);padding:10px 16px 18px;
      display:none;max-height:calc(100vh - 70px);overflow-y:auto;
    }
    .nav-links.open{display:flex}
    .nav-links a{padding:13px 10px;border-radius:8px}
    .nav-toggle{display:grid;place-items:center}
    .brand small{font-size:.66rem}
  }

  /* Phones */
  @media(max-width:640px){
    .wrap{padding:0 18px}
    .hero{padding:120px 0 70px}
    .centros-grid,.tech-grid,.manuals,.method{grid-template-columns:1fr}
    .gallery{columns:1}
    .phase{grid-template-columns:1fr;gap:16px}
    .phase .rail{flex-direction:row;gap:14px;align-items:center}
    .phase .node{width:46px;height:46px;font-size:1rem}
    .phase .line{display:none}
    section{padding:58px 0}
    .sec-head{margin-bottom:38px}
    .cta-band{padding:36px 22px}
    .logos{padding:22px 18px;gap:22px 28px}
    .logos img{height:40px}
    .lb{padding:16px}
    .lb button{width:44px;height:44px;font-size:1.2rem}
    .lb .close{top:14px;right:14px}
    .lb .prev{left:8px}
    .lb .next{right:8px}
    .lb .cap{bottom:12px;padding:0 60px}
  }

  /* Small phones */
  @media(max-width:420px){
    .hero-stats{grid-template-columns:1fr}
    .gal-filters{gap:8px}
    .gal-filters button{padding:8px 14px;font-size:.8rem}
    .brand span:first-of-type{font-size:.98rem}
  }